Alaska's Attorney General challenges EPA's authority to mandate regional rules when the Clean Water Act gives authority for national regulation.  This linked letter signals yet another states' rights issue developing between local and federal jurisdictions.  The outcome could affect virtually every type of natural resource development - particularly mining, oil and gas - for years to come.  -dh As technology advances, shale potential in many regionsbecomes more realistic.  As oil and gas prices and supply change, we urge readers -- including lawmakers concerned with competitiveness of their oil and [...]